<template>
  <div class="singer" ref="singer">
    <list-view @select="selectSinger" :data="singers" ref="list"></list-view>
    <router-view></router-view>
  </div>
</template>

<script type="text/ecmascript-6">
  import {getSingerList} from '../../api/singer.js'
  import {ERR_OK} from '../../api/config.js'
  import Singer from '../../common/js/singer'
  import ListView from '../../base/listview/listview'
  import {mapMutations} from 'vuex'
  import {playlistMixin} from '../../common/js/mixin'

  const HOT_NAME = '热门'
  const HOT_SINGER_LEN = 10


  export default {
    mixins: [playlistMixin],
    data() {
      return {
        singers: []
      }
    },
    created() {
      this._getSingerList()
    },
   methods: {
      handlePlaylist(playlist) {
        const bottom = playlist.length > 0 ? '60px' : ''
        this.$refs.singer.style.bottom = bottom
        this.$refs.list.refresh()
      },
      selectSinger(singer) {
       this.$router.push({
          path: `/singer/${singer.id}`
        })
        this.setSinger(singer)
     },
      _getSingerList() {
          getSingerList().then((res) => {
            if (res.code === ERR_OK) {
              this.singers = this._normalizeSinger(res.data.list)
            }
        })
      },
      _normalizeSinger(list) {
       let map = {
         hot: {
            title: HOT_NAME,
            items: []
         }
       }
       list.forEach((item,index) => {
         if(index < HOT_SINGER_LEN) {
           map.hot.items.push(new Singer({
             id: item.Fsinger_mid,
             name: item.Fsinger_name
             })
           )
         }
         const key = item.Findex
         if (!map[key]) {
           map[key] = {
             title: key,
             items: []
           }
         }
         map[key].items.push(new Singer({
             id: item.Fsinger_mid,
             name: item.Fsinger_name
           })
         )
       })
       //按顺序排序
      let hot = []
      let ret = []
      for (let key in map) {
        let val = map[key]
        if (val.title.match(/[a-zA-Z]/)) {
            ret.push(val)
        } else if (val.title === HOT_NAME){
            hot.push(val)
          }
        }
        ret.sort((a, b) => {
          return a.title.charCodeAt(0) - b.title.charCodeAt(0)
        })
        return hot.concat(ret)
      },
      ...mapMutations({
        setSinger: 'SET_SINGER'
      })
    },
    components: {
      ListView
    }
  }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  .singer
    position: fixed
    top: 88px
    bottom: 0 
    width: 100%
</style>
